Johannes Maron
Technical Advisor at voiio
Potsdam, Brandenburg, Germany
Summary
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Rockstar🎓
Top SchoolJohannes Maron is a seasoned technical advisor and engineering leader with 14 years of experience building and scaling backend systems, most recently guiding product and engineering strategy as Co-Founder & CTO at voiio and advising at Fizard. Based in Potsdam, he pairs deep Django and Python expertise—demonstrated by substantive contributions to the core Django repo and popular packages like django-hijack and django-health-check—with practical DevOps and QA improvements that keep projects maintainable and secure. He has led cross-functional teams at Thermondo and startups, shipping fulfilment tools and platform improvements while mentoring engineers into senior roles. An active open-source contributor, Johannes has enhanced everything from Neo4j PHP wrappers to Select2 integrations, often adding robust tests and modernizing legacy code for current Django/Python standards. Trained in IT systems engineering with design and entrepreneurship study at Stanford, he blends systems thinking with product intuition and an eye for developer experience. Outside work he’s a self-described tech nerd and committed team player, bringing both technical depth and collaborative leadership to fast-moving environments.
14 years of coding experience
13 years of employment as a software developer
It-Systems Engineering, It-Systems Engineering at Hasso Plattner InstituteDesign Challenge: Entrepreneurship, Design Challenge: Entrepreneurship at Stanford University
Japanese, Italian
Stackoverflow
1,248reputation
87kreached
44answers
18questions
Github Skills (42)
monitoring10
pytest10
python10
sphinx10
django10
testing10
object-oriented-programming10
forms10
cicd10
select210
neo4j10
php10
version-control10
documentation10
tox9
Programming languages (22)
Github contributions (5)
revsys/django-health-check
Jun 2016 - Sep 2022
a pluggable app that runs a full check on the deployment, using a number of plugins to check e.g. database, queue server, celery processes, etc.
Role in this project:
Backend Developer
Backend DeveloperContributions:40 releases, 19 reviews, 76 commits in 6 years 3 months
Contributions summary:Johannes contributed to the development of the django-health-check application, implementing features like QA tools and refactoring package structures. They were responsible for bumping the version number and addressing code style issues within the project. Their work also included refactoring views and updating documentation, contributing to the overall maintainability and functionality of the health check system.
djangodeploymentdockerrunscelery
django-hijack/django-hijack
Jan 2021 - Dec 2022
With Django Hijack, admins can log in and work on behalf of other users without having to know their credentials.
Role in this project:Back-end Developer
Back-end DeveloperContributions:44 releases, 126 reviews, 58 commits in 1 year 11 months
Contributions summary:Johannes primarily contributed to the backend of the Django Hijack application. Their work involved refactoring code, upgrading dependencies, and fixing deprecated functionalities. They updated the CI suite, implemented versioning, replaced deprecated Django functionalities such as URLs and settings, and enhanced the admin interface integration. The changes demonstrate expertise in Django development, package management, and ensuring compatibility with modern Python and Django versions.
django-hijackpythonon-behalf-ofdjangolog-in
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